BS ISO 12107-2003 Metallic materials - Fatigue testing - Statistical planning and analysis of data《金属材料 疲劳试验 数据的统计规划和分析》.pdf
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1、BRITISH STANDARD BS ISO 12107:2003 Metallic materials Fatigue testing Statistical planning and analysis of data ICS 77.040.10 BS ISO 12107:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 November 2003 BSI 21 November 2003 ISBN 0 580 4
2、2963 6 National foreword This British Standard reproduces verbatim ISO 12107:2003 and implements it as the UK national standard. It supersedes BS 3518-5:1996 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee ISE/NFE/4, Mechanical testing of metals, to S
3、ubcommittee ISE/NFE/4/6, Fatigue testing of metals, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document ma
4、y be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users
5、are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, a
6、nd keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 26, an inside back cover and a back cov
7、er. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 12107:2003(E)INTERNATIONAL STANDARD ISO 12107 First edition 2003-03-15 Metallic materials Fatigue testing Statistical p
8、lanning and analysis of data Matriaux mtalliques Essais de fatigue Programmation et analyse statistique de donnes BSISO12107:2003IS:70121 O3002(E) DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In ccacnadrow eitA hebods licnesilop gnic,y tihs file mirp eb yatnde iv roweb detu slahl ton
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13、bwww.is.o groii BSISO12107:2003 iiiContents Page Foreword iv Introduction v 1 Scope 1 1.1 Objectives 1 1.2 Fatigue properties to be analysed. 1 1.3 Limit of application . 1 2 Normative references . 1 3 Terms and definitions. 2 3.1 Terms related to statistics 2 3.2 Terms related to fatigue . 2 4 Stat
14、istical distributions in fatigue properties. 3 4.1 Concept of distributions in fatigue . 3 4.2 Distribution of fatigue life. 3 4.3 Distribution of fatigue strength . 4 5 Statistical planning of fatigue tests 4 5.1 Sampling 4 5.2 Number of specimens to be tested . 6 5.3 Allocation of specimens for te
15、sting 6 6 Statistical estimation of fatigue life at a given stress . 7 6.1 Testing to obtain fatigue life data 7 6.2 Plotting data on probability paper. 7 6.3 Estimating distribution parameters 9 6.4 Estimating the lower limit of the fatigue life. 9 7 Statistical estimation of fatigue strength at a
16、given fatigue life. 10 7.1 Testing to obtain fatigue strength data 10 7.2 Statistical analysis of test data 10 7.3 Estimating the lower limit of the fatigue strength . 11 7.4 Modified method when standard deviation is known . 11 8 Statistical estimation of S-N curve. 12 8.1 Fatigue testing to obtain
17、 S-N data . 12 8.2 Statistical analysis of S-N data. 12 8.3 Estimating the lower limit of the S-N curve. 13 8.4 Verifying the adequacy of the linear model13 9 Test report 14 9.1 Presentation of test results 14 9.2 Related information 15 Annex A (informative) Examples of applications 16 Annex B (info
18、rmative) Statistical tables . 22 Annex C (informative) Combined method for statistical estimation of a full S-N curve 24 Bibliography . 26 BSISO12107:2003iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). T
19、he work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-go
20、vernmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
21、 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a v
22、ote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12107 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommi
23、ttee SC 5, Fatigue testing. BSISO12107:2003 vIntroduction It is known that the results of fatigue tests display significant variations even when the test is controlled very accurately. In part, these variations are attributable to non-uniformity of test specimens. Examples of such non-uniformity inc
24、lude slight differences in chemical composition, heat treatment, surface finish, etc. The remaining part is related to the stochastic process of fatigue failure itself that is intrinsic to metallic engineering materials. Adequate quantification of this inherent variation is necessary to evaluate the
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